Recommendation ITU-T P.340 provides audio performance requirements and test methods for conference phones and hands-free terminals. These are limited to one-to-one meeting scenarios. Amendment 2 to Recommendation ITU-T P.340 replaces Annex B: Objective test methods for multi-talker scenarios, which was introduced in Rec. ITU-T P.340 (2000)/Amd.1 (10/2014).